CN1781288A - Multi-rate,multi-protocol,multi-port line interface for a multiservice switching platform - Google Patents
Multi-rate,multi-protocol,multi-port line interface for a multiservice switching platform Download PDFInfo
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- CN1781288A CN1781288A CNA2004800113042A CN200480011304A CN1781288A CN 1781288 A CN1781288 A CN 1781288A CN A2004800113042 A CNA2004800113042 A CN A2004800113042A CN 200480011304 A CN200480011304 A CN 200480011304A CN 1781288 A CN1781288 A CN 1781288A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1611—Synchronous digital hierarchy [SDH] or SONET
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
- H04J3/1664—Optical Transport Network [OTN] carrying hybrid payloads, e.g. different types of packets or carrying frames and packets in the paylaod
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/356—Switches specially adapted for specific applications for storage area networks
- H04L49/357—Fibre channel switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0003—Switching fabrics, e.g. transport network, control network
- H04J2203/0025—Peripheral units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0073—Services, e.g. multimedia, GOS, QOS
- H04J2203/0082—Interaction of SDH with non-ATM protocols
- H04J2203/0085—Support of Ethernet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
- H04J2203/0094—Virtual Concatenation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
- H04J2203/0096—Serial Concatenation
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Abstract
Methods and apparatus for enabling a line card to support multiple ports, multiple rates, and multiple protocols within an optical network system are disclosed. According to one aspect of the present invention, a line card that is suitable for incorporation into one of a multi-slot broadband digital cross-connect system or a multiservice provisioning platform includes a first port and a plurality of devices. The first port is arranged to be provisioned to accept an input signal which may be one of a signal of a first protocol and a signal of a second protocol. The plurality of devices being arranged to process the input signal to create an output signal which has a SONET payload. In one embodiment, the signal of the first protocol is an OC-n signal and the signal of the second protocol is a Gigabit Ethernet signal.
Description
Technical field
The present invention is general relates to data and telecommunication system.More particularly, the present invention relates to be used to provide the system and method for multiport Line cards, described multiport Line cards can be supported a plurality of signals or the line speed of different agreement effectively.
Background technology
To the demand of data and telecommunication path business with volatile rate increase.This ever-increasing demand has many being due to the fact that, i.e. use along with computing equipment becomes more in vogue, to the network of creating computing equipment so that the demand that resource can be shared between computing equipment also in growth.Computing equipment is shared transmission bandwidth usually with for the more common traditional Voice ﹠ Video business of telecommunications industry.The implementation of network and operator precedence ground consider to make that the resource from two kinds of environment can be shared with effective and efficient manner.Therefore, handle the ability of different line speeds and agreement and the ability of raising signal bandwidth and become more important.
It is an example of optical transmission device that multi-service provides platform (MSSP), it can be used in the metropolitan area network and on less relatively (for example littler than multiplexer about common or traditional SONET and digital cross connect equipment) platform TDM and SONET business are provided, and Ethernet service interface.MSSP provides usually than the common higher extensibility that sonet equipment provided and functional, and the space that needs is less than common sonet equipment, and cost is lower comparatively speaking.In addition, MSSP can make handled bandwidth increase on the network, and traditional SONET ADM and cross-coupled function are incorporated on the single platform.
In order to support a large amount of high speed metro rings, MSSP has high port density usually.Therefore, the Line cards that is used in system's (may be the part of MSSP) is developing into the multiport Line cards.The multiport Line cards of fixed rate or the Line cards that has a plurality of ports of supporting the fixed rate signal often are used among the MSSP or are used in the large-scale wideband digital interconnection (BBDXC).Though it is effective when supporting the signal of fixed rate, but the multiport Line cards that is to use fixed rate is generally understood the ability that the limit service provider makes a response to the business demand of line speed with variation, because the multiport Line cards of the purchase fixed rate that professional provider may have to too much covers all possible fixed rate.For example, if a client has sent the OC-3 signal, and wish now to send that OC-48 signal, then professional provider just need to obtain new multiport Line cards and support the OC-48 signal.
The multiport Line cards that needs to obtain each fixed rate allows the signal of different rates to be supported by system, this can cause when system is scaled lacking flexibility, and causes linecard slots all system in to exceed the possibility increase that system can expand limit with regard to being filled before obtaining traffic density completely.In order to improve the flexibility of system, some multiport Line cards have been considered some rate variations.Many speed like this, multiport Line cards can be supported two or three different signal rates of same protocol.Each port of such Line cards all be can match to support different speed.For example, many speed, multiport Line cards can be supported OC-3 and OC-12 signal.Though the use of many speed, multiport Line cards can improve the bandwidth and the flexibility of system slightly, but because only support that less relatively line speed changes, so before obtaining traffic density completely, exceeded for the possibility that system can expand limit with regard to linecard slots all in the minimizing system, to the raising of flexibility ratio too big meaning not normally with regard to being filled.And so many speed, multiport Line cards are only supported single-protocol usually.
Therefore, needed function a kind of method and apparatus that comes to this, described method and apparatus allow different line speeds can be supported effectively in the system such as MSSP or BBDXC.In other words, needed is to allow to support on different port a plurality of rate of changes of different agreement and light to cross over the Line cards that arrives (optical span reach), so that the traffic density and the flexibility that are associated with the system that uses this Line cards can be improved significantly.This Line cards of future generation should arrive such degree flexibly, promptly can increase bandwidth or be transplanted to Ethernet service from SONET by the change of software rather than hardware (comprising optical module).
Summary of the invention
The present invention relates to support the Line cards of multiport, many speed and multi-protocols, and be suitable in optical network system, using.According to an aspect of the present invention, being suitable for being included in many slots wideband digital crossconnect system or multi-service provides the Line cards in the platform one to comprise first port and a plurality of equipment.First port is arranged to be configured to accept input signal, and described input signal can be in the signal of the signal of first agreement and second agreement.A plurality of equipment are arranged to handles input signal has the SONET payload with establishment output signal.In one embodiment, the signal of first agreement is the OC-n signal, and the signal of second agreement is the gigabit Ethernet signal.
When on the signal of rate of change and a plurality of agreement (as OC-n and gigabit Ethernet agreement) is configured to same physical port in Line cards, being received, the flexibility of Line cards can be improved, and the capacity of the whole system of using this Line cards can be expanded at an easy rate.In other words, possess the ability that on Line cards, transmits a plurality of speed that can be a plurality of agreements, make the density and the flexibility that are associated with the system of Line cards and corresponding this Line cards of use be enhanced with single-port.Therefore, can improve the efficient of the whole system operation of using this Line cards.
According to another aspect of the present invention, Line cards comprises first port of a plurality of ports, and described first port is equipped with or is configured to receive in OC-3 signal, OC-12 signal, OC-48 signal and the gigabit Ethernet signal.Line cards comprises that also received signal and processing signals are to create a plurality of equipment of STS-48 sonet signal.The base plate of Line cards receives the STS-48SONET signal from a plurality of equipment, and allows the STS-48 sonet signal to be transmitted out Line cards.
In one embodiment, a plurality of equipment comprise many multirate serializations-de-serialization equipment, first equipment, second equipment and switch, wherein many multirate serializations-de-serialization equipment is arranged to the signal of accepting the serialization form, and first equipment is included in section and the circuit terminating function in the establishment of STS-48 sonet signal.Second equipment is arranged to mapping gigabit Ethernet signal and has the mapping signal of SONET payload with establishment, and switch is arranged to from many multirate serializations-de-serialization equipment received signal and signal offered first equipment or second equipment serially.When switch offered second equipment to signal, the signal after second equipment will shine upon returned to switch, and the signal after switch will shine upon subsequently sends first equipment to.
According to a further aspect of the invention, the Line cards that is configured to be included in the system on the network comprises that at least one receives the port of the signal of first form, first module and second module.First module is arranged to the signal that receives first form from described port serially, and determines when that first form is needed form.When definite first form was not needed form, first module determined when that the signal map with first form is the signal of required form, and was the signal map of first form signal of required form with first module.Second module is arranged to when determining need not first module signal map to be the signal of second form, receives the signal of first form serially from first module.When definite first form is needed form, second module also and then receive the signal of first form serially from first module, and when with first module signal map of first form being the signal of required form, second module receives the signal of required form serially from first module.Second module also determines when that with second module be the signal of required form to the signal map of first form, and is the signal map of first form signal of required form with second module in due course.
By reading the various features of the following detailed description and research accompanying drawing, these and other advantage of the present invention will become apparent.
Description of drawings
With reference to following description in conjunction with the accompanying drawings, can very well understand the present invention, in the accompanying drawing:
Fig. 1 is the diagrammatic representation of system that is suitable for accepting multiport, many speed of multi-protocols Line cards according to the embodiment of the invention.
Fig. 2 a is to be the conversion of signals of different rates and agreement multiport, the multi-protocols of STS-48SONET form, the diagrammatic representation of many speed Line cards according to the embodiment of the invention.
Fig. 2 b becomes multiport, the multi-protocols of their unprocessed form, the diagrammatic representation of many speed Line cards (for example Line cards 204 among Fig. 2 a) according to the conversion of signals STS-48 SONET form of the embodiment of the invention.
Fig. 2 c is the diagrammatic representation according to the STS-48 sonet signal of the embodiment of the invention.
Fig. 3 is that many speed, the multi-protocols according to the embodiment of the invention, the figure module of multiport Line cards are represented.
Fig. 4 is the diagrammatic representation of the section (for example section 304 of the Line cards among Fig. 3 300) according to the Line cards of the embodiment of the invention.
Fig. 5 is the diagrammatic representation through the path of the section (for example section 304 ' among Fig. 4) of Line cards of OC-3 signal, OC-12 signal according to the embodiment of the invention or OC-48 signal.
Fig. 6 is the diagrammatic representation according to the path of the section of the gigabit Ethernet signal process Line cards of the embodiment of the invention (for example section 304 ' among Fig. 4).
Fig. 7 is a kind of process chart that uses the method for many speed, multi-protocols, multiport Line cards processing signals that illustrates according to the embodiment of the invention.
Embodiment
In order to improve the flexibility of the system such as multiservice switching platform (MSSP) or large-scale wideband digital interconnection (BBDXC), be used in some little variations of some the multiport Line cards permission optical speeds in the system.Though the use of many speed, multiport Line cards can improve the bandwidth and the flexibility of system slightly, but,, the raising in flexibility when not obtaining completely traffic density, exceeds the possibility that system can expand limit with regard to being filled so can not reducing linecard slots all in the system usually because only support less relatively line speed to change.In other words, traditional many speed, flexibility and the traffic density that the multiport Line cards can not improve the system that has comprised Line cards usually significantly.
By in Line cards, utilizing existing optical transceiver (for example existing OC-48 optical transceiver), in conjunction with the clock of improvement and the data recovery module that allows programmable bandwidth to limit, comprise that the optical linecard of transceiver can send out the light signal of rate of change and agreement from the same physical port on the Line cards.For example, OC-3, OC-12, OC-48 and a gigabit Ethernet (Gig-E) business can provide from the same physical port on the Line cards, but are to be understood that a plurality of business that provide from same physical port can change in very wide scope.Possess the ability that on the Line cards that can have a plurality of ports, transmits a plurality of speed that may be a plurality of agreements, make and improved density and the flexibility that is associated with the system of Line cards and corresponding this Line cards of use with single-port.Therefore, can significantly improve the exercisable efficient of whole system of using this Line cards.
Fig. 1 is the diagrammatic representation of system that is suitable for accepting multiport, multi-protocols, many speed Line cards according to the embodiment of the invention.System 100 can be can be from San Jose, the part of ONS 15600 platforms that the Cisco Systems Inc. of California obtains, and it generally includes power distributing unit 104, matrix card 108 and timing shelf controller 112.System 100 also can be the part of MSSP or BBDXC.It will be understood by those skilled in the art that matrix card 108 can be the interconnection card.System 100 can also comprise the various Line cards of the slot of the system of being arranged in 100, for example generally has the OC-48 Line cards 116 that reaches about 16 ports and generally has the OC-192 Line cards 120 that reaches about four ports.
Go out as shown, system 100 also comprises a plurality of multiports, multi-protocols, many speed Line cards 124.Each multiport, multi-protocols, many speed Line cards 124 can comprise and reach about 16 or more a plurality of port, and may be arranged to and receive various dissimilar inputs.In one embodiment, each multiport, multi-protocols, many speed Line cards 124 can be configured to receive fully the combination in any of OC-3, OC-12, OC-48 and gigabit Ethernet signal.
In system 100, use Line cards 124 can effectively utilize I/O (I/O) slot, because in fact each slot of Support Line an outpost of the tax office 124 can support the combination of OC-3, OC-12, OC-48 and gigabit Ethernet signal.Therefore, system 100 can expand at an easy rate, and can obtain bandwidth upgrading (for example from the OC-3 signal to the OC-48 signal) fully and do not need equipment is carried out bigger change.The port of Line cards 124 can be configured to be suitable for to change port and expect the type of the signal that receives.
Fig. 2 a is to be the conversion of signals of different rates and agreement multiport, the multi-protocols of STS-48SONET form, the diagrammatic representation of many speed Line cards according to the embodiment of the invention.The Line cards 204 that is described in detail in conjunction with Fig. 3 below is arranged to receiving inputted signal 208 on port 210, and input signal is mapped as or is converted to the output signal 212 that can offer base plate port 214.Reach about 16 or more a plurality of port 210 though Line cards 204 generally is configured to comprise,, only show the situation that on Line cards 204, comprises four ports 210 for illustrated simple.
In described embodiment, Line cards 204 is arranged to the output signal 212 that input signal 208 is mapped as the STS-48SONET form.For example, OC-3 input signal 208a is mapped as the output signal 212a of STS-48SONET form by Line cards 204.Similarly, OC-12 input signal 208b is mapped as the output signal 212b of STS-48SONET form by Line cards 204, in fact OC-48 input signal 208c is not shone upon by Line cards 204, and be transmitted basically and passed through Line cards 204, formed the output signal 212c of STS-48SONET form.
Except being suitable for receiving OC-3, OC-12 and the OC-48 signal, Line cards 204 also is suitable for receiving the gigabit Ethernet signal.Input signal 208d on the shown port 210 is exactly the gigabit Ethernet signal.Input signal 208d can be mapped as the output signal 212d of STS-48 form in Line cards 204.Therefore no matter be what agreement, each is received by Line cards 204 and the input signal 208 that shines upon all is mapped as the output signal 212 with common type.
In the port 210 each can be configured to accept the flow of particular types usually.Though each port 210 can be configured to accept in OC-3, OC-12, OC-48 or the gigabit Ethernet signal any one, each port 210 generally is configured to essence and only accepts the discharge pattern that receives that each port 210 is expected.Therefore, because input signal 208a is the OC-3 signal, so the port 210 of receiving inputted signal 208a generally is configured to accept the OC-3 signal.
It is suitable unprocessed form that Line cards 204 is configured to the STS-48SONET conversion of signals that receives, and promptly is mapped as the form of STS-48SONET form.Fig. 2 b becomes multiport, the multi-protocols of their unprocessed form, the diagrammatic representation of many speed Line cards (for example Line cards 204 among Fig. 2 a) according to the conversion of signals the STS-48SONET form of the embodiment of the invention.When receiving STS-48SONET signal 212 ' on base plate port 214, Line cards 204 can be studied to determine whether signal 212 ' is created from OC-3, OC-12, OC-48 or gigabit Ethernet signal signal 212 '.In case determined the form of signal 212 ' before converting the STS-48SONET form to, just can be from signal 212 ' reconstruction signal 208 ' effectively.For example, Line cards 204 definite signal 212a' are original is the OC-3 signal.Like this, Line cards 204 just is mapped as or is converted to OC-3 signal 208a ' to signal 212a'.
Usually, establishment can comprise free time, sky or zero input from the STS-48SONET of different-format signal, and it is the STS-48SONET form that these inputs are used to the signal map such as OC-3, OC-12 and gigabit Ethernet signal.Next with reference to figure 2c, will signal creation STS-48SONET signal from different rates or agreement be described according to the embodiment of the invention.The OC-3 signal 230 that receives on multiport, multi-protocols, many speed Line cards 234 is mapped as the signal 238 of the STS-48SONET form that approximately comprises 48 STS-1 frames.Any three STS-1 channels in the STS-48 frame comprise the data from OC-3 signal 230 effectively, and 45 remaining STS-1 channels are with idle, zero, AIS, random data or can be in fact that any other valid data are filled effectively.Simple for what discuss, remaining being filled in here of STS-1 channel will generally be discussed by the free time with the back, but is to be understood that any in fact information can be used for filling remaining STS-1 channel.For clarity sake, first three the STS-1 channel in the signal 238 is shown as including the data from the OC-3 signal, but any three STS-1 channels can be used for carrying the data from the OC-3 signal.Similarly, the OC-12 signal 238 that receives on the Line cards 234 is mapped as the signal 242 of STS-48SONET form, wherein any 12 the STS-1 channels in the STS-48 of signal 242 frame all comprise the information from OC-12 signal 238, and 36 STS-1 channels of remainder zero padding of signal 242.For clarity sake, preceding 12 the STS-1 channels in the signal 242 are shown as including data, but any 12 STS-1 channels generally can be used for comprising data.
Because OC-48 signal 246 Line cards 234 mappings in fact of no use, so OC-48 signal 246 is output as STS-48SONET signal 250 from Line cards 234, all comprise the data that are associated with OC-48 signal 246 comprising each the STS-1 frame in signal 250.In other words, each that is included in 48 STS-1 frames in the signal 250 all comprises the data that are associated with OC-48 signal 246.
General, can change gigabit Ethernet signal 254 or be mapped as various continuous cascade or Virtual Concatenation by Line cards 234, described cascade can be included in the output signal 258 that is associated with gigabit Ethernet signal 254.Such cascade includes, but is not limited to STS-1 channel, STS-3c cascade, STS-6c cascade, STS-9c cascade, STS-12c cascade, STS-24c cascade, STS-48c cascade and from 1 to 48STS1-Nv or from the SONET form of 1 to 16STS3c-Yv various Virtual Concatenations.For example, when gigabit Ethernet signal 254 is mapped as the STS-1 cascade, can create the output STS-48SONET signal 258a that comprises the STS-1 channel in the STS-48, so that the information in the gigabit Ethernet signal 254 of being included in is comprised in arbitrary STS-1 channel in the STS-48 frame among the signal 258a, and remaining 47 STS-1 channels with idle, zero, AIS, random data or other payload fill.Same, when gigabit Ethernet signal 254 is mapped as the STS-24c cascade, any 24 STS-1 channels of the STS-48 frame among the signal 258e can comprise the information that is included in the gigabit Ethernet signal 254, and remaining 24 STS-1 channels can be filled with idle, zero, AIS, random data or other payload.
When the base plate by Line cards 234 received the STS-48SONET signal, Line cards 234 can determine which STS-1 channel comprises actual information in the signal, and which the STS-1 channel in the STS-48 frame of signal comprises desired payload.Therefore, can discern the expression of the primary signal that is converted into the STS-48SONET signal.In other words, except creating from primary signal the STS-48SONET signal, Line cards 234 also is suitable in given identification primary signal during from STS-48SONET signal that primary signal is created.For example, in fact the STS-48SONET signal can be OC-3, OC-12 or OC-48 signal by the reduction primary signal that determine to be included in the STS-48SONET signal.
With reference to figure 3, will the function of many speed, multi-protocols, multiport Line cards be described.Fig. 3 is that multiport, the multi-protocols according to the embodiment of the invention, the figure module of many speed Line cards are represented.Line cards 300 is embodiment of the Line cards 204 among Fig. 2 a, and it comprises four sections 304, and each section all is arranged to supports four ports.The port number that the number of the section of being to be understood that 304 can be supported according to Line cards 300 and changing.Port number in the section 304 also can change.
Each section 304 all comprises the optical device 308 that is used for four ports, and described optical device and clock and data recovery module 312 communicate.Optical device 308 is arranged to received signal (for example signal that transmits in the network), and signal is sent to clock and data recovery module 312 serially.In one embodiment, the signal that received of optics 308 can comprise OC-3 signal, OC-12 signal, OC-48 signal and gigabit Ethernet signal.
Clock and data recovery module 312 comprises that allowing OC-3, OC-12 and OC-48 signal map is the mapping function of common form (for example OC-48 signal format).For example, clock and data recovery module 312 can obtain the OC-3 signal from optical device 308, carries out clock recovery, doubly is multiplied by clock (multiply a clock up), and the OC-48 signal of output is provided.This can pass through partly terminating section overhead, and section, circuit and the payload mappings of input signal are finished in the STS48 frame.Yet, not mapped in clock and data recovery module 312 usually through the gigabit Ethernet signal of optical device 308, but in fact directly pass through clock and data recovery module 312.General, clock and data recovery module 312 allows programmable bandwidth constraints, and it provides the ability that transmits OC-3, OC-12, OC-48 and gigabit Ethernet business from the same physical port that is coupled to optical device 308.
Each clock and data recovery module 312 all receives serial signal from optical device 308, carries out suitable mapping, and the serial signal of output being provided for module 316, for example STS-48 signal or gigabit Ethernet signal.Module 316 comprises switch and submodule, described submodule is carried out the gigabit Ethernet mapping function to the gigabit Ethernet signal that receives, to be the gigabit Ethernet conversion of signals the continuous cascade or the Virtual Concatenation of sonet signal effectively, these cascades are mapped as the STS-48SONET signal subsequently.Switch in the module 316 allows OC-48 signal process module 316 and enters into application-specific integrated circuit (ASIC) (ASIC) 320, and this circuit can the section of comprising and circuit terminating function.In other words, ASIC 320 can be described this below with reference to Fig. 4 and Fig. 5 carrying out section terminating and circuit terminating so that the STS-48SONET signal can be transmitted out ASIC 320 and therefore send out Line cards 300 through the OC-48 signal of module 316.General, ASIC 320 also can adjust frame with other STS-48SONET signal.
As previously mentioned, module 316 comprises the submodule of carrying out the gigabit Ethernet mapping function.Switch generally carries out route so that the gigabit Ethernet signal can be mapped to the gigabit Ethernet signal, described switch carries out route according to the configuration mode of the circuit that is associated with module 316 to the signal in the module 316, below with reference to Fig. 4 and Fig. 6 this is discussed.In case the gigabit Ethernet signal is mapped in module 316, mapped signal just is transmitted to ASIC 320 sections of being used for and circuit terminating.
Fig. 4 is the diagrammatic representation of the section (for example section 304 of the Line cards among Fig. 3 300) according to the Line cards of the embodiment of the invention.The section 304 ' of Line cards comprises the optical device 408 that is used for each port, and described port for example is each in four ports that are associated with section 304'.Optical device 408 is communicated by letter with the clock and data recovery module 412 with mapping function, this module comprises many multirate serializations-de-serialization chip in described embodiment, it makes serialized signal pass through module 412 and also makes the signal of de-serialization be multiplexed as serialized signal.Optical device 408 generally comprises and receives and sending function, and can be module, SFP or discrete implementation.In described embodiment, when the signal that receives through optical device from port when module 412 is OC-3 or OC-12 signal, be to be understood that module 412 can carry out OC-3 or OC-12SONET framing and B1 respectively to signal subsequently and handle.
In one embodiment, in case module 412 (for example module 412a) is used to signal is carried out suitable mapping, one in STS-48 signal and the gigabit Ethernet signal will be sent to total module 416 from module 412a.Total module 416 comprises the first chipset 416a, and this chipset comprises switch 418,422 and is suitable for being used in the chip 426 that shines upon in the gigabit Ethernet signal.Go out as shown, chipset 416a is arranged to the port that support is associated with optical device 408a, 408b, and chipset 416b is arranged to the port that support is associated with optical device 408c, 408d.
Switch 418,422 can be in fact any suitable switch, for example two 2x2 switches, its be arranged to make signal directly by or signal carried out route by chip 426, this chip 426 encapsulates the gigabit Ethernet signal and be mapped as the SONET payload such as the STS-48SONET signal.For example, for the gigabit Ethernet signal, can create the STS-n frame and be mapped as the STS-48 frame.In case signal is handled by chip 416a or by chip 416a effectively, this signal just is provided for ASIC 438 sections of being used for and circuit terminating.Section and circuit terminating can comprise framing, pointer processing and overhead processing.Signal is sent to the back plane connector 446 that can be coupled to the section 304 ' on matrix card or the interconnection card (not shown) from ASIC 438.Though being to be understood that ASIC 438 is an assembly by actual displayed, ASIC 438 can be made of the assembly of arbitrary number usually, for example four assemblies.
In one embodiment, optical device 408 and module 412 are arranged on the subcard inserted 410 in can the section of being incorporated in 304 '.Subcard 410 (being actually optical transceiver) can be coupled on chipset 416a, the 416b and ASIC 438 in the part 442 of the section of being incorporated in 304 ' by connector.When optical device 408 and module 412 are arranged at can insert on the subcard 410 time, again when the signal that has only a fixed rate is in fact received by section 304 ', subcard 410 can be exchanged into another subcard that only disposes for this fixed rate then.
As mentioned above, when the port of section 304 ' was configured to accept signal such as OC-3 signal or OC-12 signal, it was the OC-48 signal that module 412 is arranged to signal map.Perhaps, when the port of section 304 ' was configured to accept the OC-48 signal, module 412 was arranged to and allows signal not shine upon by module 412 effectively.With reference to figure 5, the path of the section (for example section 304 ' among Fig. 4) of OC-3, OC-12 or OC-48 signal process Line cards will be described according to embodiments of the invention.Input 506 can be in OC-3, OC-12 or the OC-48 signal one in described embodiment, the port (not shown) of its section of being provided for 304 ', thus and offer optical device 408a.Then, signal 506 is provided for module 412a, and signal 506 can be mapped or be converted the signal of different rates in module 412a.For example, if signal 506 is OC-3 or OC-12 signal, then signal 506 is mapped as STS-48 signal 506 ' by module 412a.Yet if signal 506 is OC-48 signals, signal 506 is not shone upon by module 412a, but passes through module 412a in fact as STS-48 signal 506 '.
Signal 506 ' is sent to chipset 416a or more specifically on the switch 418 of chipset 416a.Because signal 506 ' is not the gigabit Ethernet signal, so in fact switch 418 carries out route directly through chipset 416a and entering among the ASIC 438 to signal 506', ASIC 438 carries out STS-48SONET section and circuit terminating, and STS-48SONET signal 506 " offer base plate 446 and export base plate 446.As mentioned above, when signal 506 " when creating the signal 506 of the OC-3 signal of doing for oneself, then signal 506 " in any three STS channels comprise data, and remaining channel comprises free time or out of Memory as mentioned.Similarly, when signal 506 " when creating the signal 506 of the OC-12 signal of doing for oneself, then signal 506 " in any 12 STS channels comprise data, and remaining channel comprises free time or out of Memory.When signal 506 " when creating the signal 506 of the OC-48 signal of doing for oneself, signal 506 in fact then " in all STS frames all comprise the data in signal 506 originally.
Replace being configured to accept OC-3, OC-12 or OC-48 signal, the port of section 304 ' can be configured to accept the gigabit Ethernet signal.With regard to total module 416, when first port of section 304 ' was configured to accept the gigabit Ethernet signal, the path the when path of input signal generally is OC-3, OC-12 or OC-48 signal with input signal was different.Fig. 6 is the diagrammatic representation according to the path of the section of the gigabit Ethernet signal process Line cards of the embodiment of the invention (for example section 304 ' among Fig. 4).When gigabit Ethernet signal 606 was coupled to the port (not shown) reception of the section 304 ' on the optical device 408a, signal 606 was sent to module 412a from optical device 408a.Module 412a generally carries out route output module 412a to signal 606, and does not shine upon in fact or switching signal 606.In other words, in fact signal 606 can walk around the clock and data recovery part of module 412a.Yet, be to be understood that if desired and can use clock and data recovery.Therefore, the signal 606 ' corresponding to the output of the module 412a of signal 606 is the gigabit Ethernet signal.
Signal 606 ' is provided for chipset 416a or can effectively identifies signal 606 ' more specifically and is the switch 418 of gigabit Ethernet signal.In one embodiment, switch 418 is selected the suitable data path according to the signal 606 ' that is configured to of chipset 416a.Because signal 606 ' is the gigabit Ethernet signal, so carrying out route, 418 pairs of signals of switch 606 ' enter in the chip 426, chip 426 encapsulates signal 606 ' and be mapped as the signal 606 of the SONET STS-48 that has gigabit Ethernet mapping payload ".Be to be understood that chip 426 can be included as the clock and data recovery function that the mapping of signal 606 ' facilitates.
Signal 606 " send back switch 418 from chip 426, switch 418 is subsequently signal 606 " be routed to signal 606 " carry out the ASIC 438 of section and circuit terminating.In case to signal 606 " carried out section and circuit terminating; and ASIC 438 is output signal 606 effectively just; signal 606 are the STS-48SONET signal in described embodiment, have to reach 48 STS channels and comprise data corresponding to gigabit Ethernet signal 606 in this signal.
The method of using many speed, multi-protocols, multiport Line cards processing signals is according to an embodiment of the invention described below with reference to Fig. 7.The method 700 of processing signals starts from step 704, and wherein signal is received on the port of Line cards.Generally, signal can be received by the link in network, and this network has comprised the system of Line cards integrated.Whether in case receive signal on port, just making about signal in step 708 is the OC-48 signal judgment.If determine that signal is the OC-48 signal, then being designated as signal can not carry out mapping to signal and handle by Line cards effectively.Therefore, handling process is transferred to step 732 from step 708, wherein signal is carried out STS-48SONET section and circuit terminating, and passes the signal to the base plate of Line cards.It will be understood by those skilled in the art that execution section and circuit terminating generally comprise framing, pointer is handled and overhead processing.After having carried out STS-48SONET section and circuit terminating processing, the method for processing signals has just been finished.
Turn back to step 708, when the signal that receives on the port of having determined in Line cards is not the OC-48 signal, determine in step 712 that then signal still is the OC-12 signal for the OC-3 signal, if determine that signal is not neither the OC-3 signal is again the OC-12 signal, then in described embodiment, its connotation is that signal is the gigabit Ethernet signal.Like this, in step 716, gigabit Ethernet signal quilt terminating is effectively created the initial data that is packaged into encapsulation format.General, can be the gigabit Ethernet signal map encapsulation format with any suitable encapsulation format that is configured (for example X.86, GFP or can be, the Cisco HDLC that the Cisco Systems Inc. of California obtains) from San Jose.In case terminating of gigabit Ethernet signal and encapsulation format are created, just in step 720, be the STS-48 frame of the mapped signal creation section of comprising, circuit and path cost.
In step 724, be packed data map STS-n signal payload, and the STS-n frame is mapped as the STS-48 frame.When having than the more STS-48 frame of STS-n frame, then idle (for example zero or out of Memory) can be inserted in the untapped channel.In other words, with do not have and STS-1 channel that the STS-48 frame of the content of STS-n signal correction connection is associated in can insert free time or out of Memory.For example, when the STS-3c frame is mapped as the STS-48 frame, then any three STS-1 channels of STS-48 frame generally will comprise the content of STS-3c frame, and the STS-1 frame of remaining STS-48 frame generally will comprise free time or out of Memory.
The STS-n frame is mapped as after the STS-48 frame, carry out STS-48SONET section and circuit terminating in step 728, and signal is sent on the base plate of connector.Can comprise that framing, pointer are handled and the section of overhead processing and circuit terminating and signal are sent on the base plate in case carried out, the method for processing signals has just been finished.
Turn back to step 712,, then in step 736, carry out suitable STS-3 or STS-12 framing if determine that signal is OC-3 signal or OC-12 signal.In addition, can carry out the terminating of section wholly or in part that comprises that framing and B1 handle.Finished after the STS-3 or STS-12 framing of signal, in step 740, created the STS-48 frame of signal.In step 744, STS-3 or STS-12 frame are mapped as the STS-48 frame then.When signal is mapped as the STS-3 frame, then any three STS-1 channels of STS-48 frame generally will comprise the content of STS-3 frame, and the STS-1 channel of remaining STS-48 frame generally will for example be filled with the free time.Similarly, when signal is mapped as the STS-12 frame, then any 12 STS-1 channels of STS-48 frame generally will comprise the content of STS-12 frame, and the STS-1 channel of remaining STS-48 frame for example fills up with the free time usually.
In case STS-3 or STS-12 frame suitably are mapped as the STS-48 frame, just in step 748, carry out STS-48SONET section and circuit terminating and signal is sent on the base plate of connector.Carried out and comprised that framing, pointer are handled and after the section of overhead processing and circuit terminating and signal be sent on the base plate, the method for processing signals had just been finished.
Though only described several embodiments of the present invention, be to be understood that the present invention can not break away from the spirit or scope of the present invention with many other specific forms embodiments.For example, though many speed, multi-protocols, multiport Line cards are described to receive OC-3, OC-12, OC-48 or gigabit Ethernet signal and allow signal to be converted into the STS-48SONET payload, this Line cards also can be arranged to usually and receive any appropriate signal.In other words, the signal type that receives on many speed, multi-protocols, multiport Line cards can change in very wide scope, and the performance of this Line cards also is transformable.For example, can receive OC-n signal such as the OC-192 signal in one embodiment.When arranging to receive the OC-192 signal, the assembly that can change or change above-mentioned Line cards adapts to the OC-192 signal.And, replacing conversion of signals or be mapped as the STS-48SONET signal, signal can be mapped as dissimilar sonet signals, for example STS-nSONET signal or have any appropriate signal of SONET payload in fact.
The number of the type (for example speed) of the signal that can be handled by many speed, multi-protocols, multiport Line cards also can change in very wide scope.Though described the situation that many speed, multi-protocols, multiport Line cards received and handled the signal of nearly four different rates that can be received by 16 ports nearly and two different agreements, the number of speed can be less than four or more than four.Similarly, the number of the agreement that Line cards is supported also can change, also the same can the variation of number of the port that is associated with Line cards.
The various modules that are included in the Line cards may be embodied as the hardware that comprises firmware code equipment or are embodied as the software that comprises software coding equipment.For example, can the section of execution and the ASIC of circuit terminating can programme with the firmware code equipment of the section of providing and circuit terminating function.Be to be understood that some modules can programme effectively with the combination of firmware code equipment and software coding equipment.
Many speed, multi-protocols, multiport Line cards are described to suitable use with regard to MSSP or BBDXC aspect usually.Be to be understood that MSSP and BBDXC just can benefit from the system of use Line cards of the present invention or the example of platform.Therefore, many speed, multi-protocols, multiport Line cards can be used for the optical system of a plurality of optical speeds of any in fact support and a plurality of agreements usually.
General, the step that is associated with the many speed of operation, multi-protocols, the method for multiport Line cards can change in very wide scope.Step can be increased, deletes, changes or reorder and not break away from the spirit or scope of the present invention.Therefore these examples should be considered to be exemplary and not restrictive, and the invention is not restricted to given details here, but can revise within the scope of the appended claims.
Claims (25)
1. Line cards, it is arranged to and is included in many slots wideband digital crossconnect system or multi-service and provides among in the platform one, and described Line cards comprises:
First port, described first port is arranged to be configured to accept input signal, and wherein said input signal is in the signal of the signal of first agreement and second agreement; And
A plurality of equipment, described a plurality of equipment are arranged to be handled described input signal and has the output signal of SONET payload with establishment, and wherein said a plurality of equipment are configured to handle the signal of described first agreement and the signal of described second agreement.
2. Line cards as claimed in claim 1, the signal of wherein said first agreement are the OC-n signals, and the signal of described second agreement is the gigabit Ethernet signal.
3. Line cards as claimed in claim 2, wherein said OC-n signal are in OC-3 signal, OC-12 signal and the OC-48 signal.
4. Line cards as claimed in claim 2, wherein said output signal are the STS-n signals.
5. Line cards as claimed in claim 4, wherein said output signal are the STS-48 signals that comprises about 48 STS-1 frames.
6. Line cards as claimed in claim 1, wherein said a plurality of equipment comprise:
First equipment, it is arranged to when described input signal is the signal of described first agreement, accepts the described input signal of serialization form and handles described input signal;
Second equipment, it comprises section and circuit terminating function in the establishment that is used in described output signal;
The 3rd equipment, described second equipment is arranged to when described signal is the signal of described second agreement, shines upon described input signal to create described output signal; And
Switch, described switch is arranged to from described a plurality of first equipment and receives described signal serially, and described signal is offered in described second equipment and described the 3rd equipment one, wherein when described switch offers described signal described the 3rd equipment, the signal of described the 3rd equipment after described mapping returns to described switch, and described switch sends the signal after the described mapping to described second equipment subsequently.
7. Line cards, described Line cards are arranged to and are included in many slots wideband digital crossconnect system or multi-service and provide among in the platform one, and described Line cards comprises:
A plurality of ports, described a plurality of ports comprise first port, and described first port is arranged to received signal, and described signal is in OC-3 signal, OC-12 signal, OC-48 signal and the gigabit Ethernet signal;
A plurality of equipment, described a plurality of equipment are arranged to and receive described signal and handle described signal to create the STS-48SONET signal; And
Base plate, described base plate are arranged to from described a plurality of equipment and receive described STS-48SONET signal.
8. Line cards as claimed in claim 7, wherein a plurality of equipment comprise:
Many multirate serializations-de-serialization equipment, it is arranged to the signal that receives described serialization form;
First equipment, it is included in section and circuit terminating function in the establishment of described STS-48SONET signal;
Second equipment, described second equipment are arranged to the described gigabit Ethernet signal of mapping has the SONET payload with establishment mapping signal; And
Switch, described switch is arranged on serialization-de-serialization equipment from described many speed and receives described signal serially, and described signal is offered in described first equipment and described second equipment one, wherein when described switch offers described signal described second equipment, the signal of described second equipment after described mapping returns to described switch, and described switch sends the signal after the described mapping to described first equipment subsequently.
9. Line cards as claimed in claim 8, the serialization of wherein said many speed-de-serialization equipment also is arranged to carries out mapping to described OC-3 signal and described OC-12 signal, and essence allows described OC-48 signal and described gigabit Ethernet signal to pass through.
10. Line cards as claimed in claim 7, wherein when described signal is described OC-3 signal, described STS-48SONET signal comprise about three have with the STS-1 channel of the data of described OC-3 signal correction connection and about 45 not with the STS-1 channel of the data of described OC-3 signal correction connection.
11. Line cards as claimed in claim 7, wherein when described signal is described OC-12 signal, described STS-48SONET signal comprise about 12 have with the STS-1 channel of the data of described OC-12 signal correction connection and about 36 not with the STS-1 channel of the data of described OC-12 signal correction connection.
12. Line cards as claimed in claim 7, wherein when described signal is described OC-48 signal, described STS-48SONET signal comprises about 48 STS-1 channels that have with the data of described OC-48 signal correction connection.
13. a Line cards, described Line cards are arranged in the system that is included on the network, described Line cards comprises:
At least one port, it is arranged to the signal that receives first form;
First module, described first module is arranged to the signal that receives described first form from the described port serially, described first module also is arranged to and determines when that described first form is needed form, wherein when having determined that described first form is not described needed form, described first module again and then be arranged to and determine when that with described first module be described needed form to the signal map of described first form, and when having determined to be the signal of described required form to the signal map of described first form with described first module, using described first module is the signal map of described first form described needed form; And
Second module, described second module is arranged to when having determined need not described first module described signal map to be the signal of described second form, receive the signal of described first form on described first module serially, described secondary signal also is arranged to when having determined that described first form is described needed form, receive the signal of described first form on described first module serially, described second module also is arranged to when with described first module signal map of described first form being the signal of described required form, receive the signal of described required form on described first module serially, wherein said second module again and then be arranged to and determine when that with described second module be the signal of described required form to the signal map of described first form, and when having determined to be the signal of described required form to the signal map of described first form with described second module, using described second module is the signal map of described first form signal of described required form.
14. Line cards as claimed in claim 13 also comprises:
Three module, described three module is arranged to the signal that receives described required form from described second module, described three module also is arranged to carries out section and circuit terminating to the signal of described required form, and the signal that generates is sent out described Line cards.
15. Line cards as claimed in claim 14, wherein said first form is in OC-3 form, OC-12 form, OC-48 form and the gigabit Ethernet form, described needed form is described OC-48 form, and the signal of described generation is the STS-48SONET signal.
16. Line cards as claimed in claim 13, wherein said first module comprises the clock and data recovery function.
17. Line cards as claimed in claim 15, wherein said first form are that OC-3 form and described needed form are the OC-48 forms, and wherein said first module to be arranged to the signal map of described OC-3 form be the signal of described OC-48 form.
18. Line cards as claimed in claim 15, wherein said first form is that OC-12 form and described needed form are the OC-48 forms, and wherein said first module to be arranged to the signal map of described OC-12 form be the signal of described OC-48 form.
19. Line cards as claimed in claim 13, wherein said first form is that gigabit Ethernet form and described needed form are the OC-48 forms, and wherein said first module to be arranged to the signal map of described gigabit Ethernet form be the signal of described OC-48 form.
20. Line cards as claimed in claim 13, wherein said first form are in OC-3 form, OC-12 form, OC-48 form and the gigabit Ethernet form.
21. the method for first signal that is used for receiving on the process circuit card, described Line cards are arranged to the part of the system in the network, described method comprises:
On first port of described Line cards, receive described first signal;
Determine when that described first signal is first form;
When definite described first signal is described first form, described first signal is carried out section and circuit terminating;
Determine when that described first signal is second form;
When definite described first signal is described second form, from the signal of first signal creation the 4th form of described second form;
Determine when that described first signal is described the 3rd form; And
When definite described first signal is described the 3rd form, from the signal of described the 4th form of first signal creation of described the 3rd form.
22. method as claimed in claim 21, wherein comprise that from the step of the signal of described the 4th form of first signal creation of described second form when definite described first signal is described second form described first signal being carried out framing handles, is the signal map after the described framing described the 4th form, and the signal after the framing of described mapping is carried out section and circuit terminating.
23. method as claimed in claim 21, wherein the step from the signal of described the 4th form of first signal creation of described the 3rd form comprises that be the 5th form to described first signal map, is the signal map of described the 5th form described the 4th form, and the signal after the described mapping is carried out section and circuit terminating.
24. method as claimed in claim 21, wherein said first form is the OC-48 form, and described second form is a kind of in OC-3 form and the OC-12 form, and described the 3rd form is the gigabit Ethernet form.
25. method as claimed in claim 24, wherein said the 4th form is the STS-48SONET form.
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| PCT/US2004/013913 WO2005002110A2 (en) | 2003-06-19 | 2004-05-06 | Multi-rate, multi-protocol, multi-port line interface for a multiservice switching platform |
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| CN101039323B (en) * | 2007-04-27 | 2010-05-19 | 华中科技大学 | Multi-rate multi-protocol bit stream processor |
| WO2010009647A1 (en) * | 2008-07-24 | 2010-01-28 | 中兴通讯股份有限公司 | Method and apparatus for implementing an optical interface with a plurality of velocities |
| CN101330328B (en) * | 2008-07-24 | 2012-07-04 | 中兴通讯股份有限公司 | Method and apparatus for implementing multi-speed optical interface |
| CN102891813A (en) * | 2012-09-05 | 2013-01-23 | 盛科网络（苏州）有限公司 | Ethernet port architecture supporting multiple transmission modes |
| CN102891813B (en) * | 2012-09-05 | 2015-09-23 | 盛科网络（苏州）有限公司 | Support the ethernet port framework of multiple transmission mode |
| CN115297001A (en) * | 2022-10-08 | 2022-11-04 | 湖南恩智测控技术有限公司 | Multi-port multi-protocol communication method and board card |
| CN115297001B (en) * | 2022-10-08 | 2022-12-16 | 湖南恩智测控技术有限公司 | Multi-port multi-protocol communication method and board card |
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| CA2521514A1 (en) | 2005-01-06 |
| EP2416534B1 (en) | 2019-07-24 |
| WO2005002110A2 (en) | 2005-01-06 |
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| US7822022B2 (en) | 2010-10-26 |
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| US6956847B2 (en) | 2005-10-18 |
| CA2521514C (en) | 2011-09-20 |
| WO2005002110A3 (en) | 2005-04-28 |
| AU2004253068A1 (en) | 2005-01-06 |
| EP1634414A2 (en) | 2006-03-15 |
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